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If the air is blown lightly at the open end of the closed organ pipe, then the air column vibrates (as shown in figure) in the fundamental mode. There is a node at the closed end and an antinode at the open end. If l is the length of the tube, l = λ1/4 or λ1 = 4l …... (1) If n1 is the fundamental frequency of the vibrations and v is the velocity of sound in air, then n1 = v/λ1 = v/4l …... (2) If air is blown strongly at the open end, frequencies higher than fundamental frequency can be produced. They are called overtones. Fig.b & Fig.c shows the mode of vibration with two or more nodes and antinodes.

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What is the power required to raise 300 liters of water per minute through a height of 6m using a pipe of diameter 2.5 m ? (g=10m/s(square).

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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Priya Gupta 6 years, 8 months ago

No,it is not tough .

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A particle has displacement equation : (a) Xa= 2t + 7 (b)Xb=3t2(square)+2t+6 (c) Xc=5t3(cube)+4t Which of them has uniform acceleration?

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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Why newton's law of gravitation is said to be the universal law?

Posted by Priya Gupta 6 years, 8 months ago

CBSE > Class 11 > Physics

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Nitu Goyal 6 years, 8 months ago

Because its value same everywhere in the universe

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Newtons third law

Posted by Moirangthem Nungshithoi 6 years, 8 months ago

CBSE > Class 11 > Physics

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Yogita Ingle 6 years, 8 months ago

Newton’s Third Law

To every action, there is always an equal and opposite reaction.

For example, when you hold the ball, a force acts on the ball (Action), and an equal and opposite force acts on your hand (Reaction).

Action & Reaction forces always act on different bodies
- F_AB = F_BA
- F_AB: Force acting on A by B
- F_BA: Force acting on B by A
Action & Reaction forces occur at the same instant

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State newton's second law of motion also show that newton's first and third law both are contained in it

Posted by Riya Rajput 6 years, 8 months ago

CBSE > Class 11 > Physics

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In what percentage in science I choose In 11 class

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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Yogita Ingle 6 years, 8 months ago

Escape velocity is the minimum velocity that a body must attain to escape the gravitational field of the earth.
Suppose if we throw a ball,it will fall back. This is happening due to the force of gravitation exerted on the ball by the surface of the earth due to which the ball is attracted towards the surface of the earth.
If we increase the velocity to such an extent that the object which is thrown up will never fall back.This velocity is known as escape velocity.

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What is elastic limit of a body?

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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Paper 2016

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CBSE > Class 11 > Physics

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Derive an expression for nth mode of vibration in case of a closed end organ pipe.hence give the value of v1:v3:v5

Posted by Shakshi Rana 6 years, 8 months ago

CBSE > Class 11 > Physics

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CBSE > Class 11 > Physics

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Define the doppler effect.?

Posted by Rahul Kumar 6 years, 8 months ago

CBSE > Class 11 > Physics

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Riya Sharma 6 years, 8 months ago

When the relative motion takes place between source and observer then the apparent frequencies are observed by the observer that effect is known as doppler effect.

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How do ball bearings help to reduce friction? Plzz answer it as 1 mark question

Posted by Harvinder Kaur 6 years, 8 months ago

CBSE > Class 11 > Physics